 <!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Page Title</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
    <div>
        <ul>
            <ol>同步个异步的区别是什么？分别举一个同步和异步的例子</ol>
            <ol>一个关于setTimeout的笔试题</ol>
            <ol>前端使用异步的场景有哪些</ol>
        </ul>
    </div>
    <script>
        //异步
        console.log(100)
        setTimeout(function(){
            console.log(200)
        },10000)
        console.log(300)  //100  300 200
    </script>
</body>
</html>